The donut and coffee chain will launch cold brew coffee nationally in the third quarter, said Dunkin' Donuts CFO Paul Carbone at an investor presentation Tuesday. A Dunkin' Donuts spokeswoman confirmed the launch via email, noting cold brew will be available officially June 27 at participating Dunkin' Donuts restaurants in the Metro New York and Los Angeles markets. It will be available nationwide later this summer.

As TheStreetreported in April, Dunkin' started to test cold brew coffee at participating restaurants in Springfield, Mass., and Portland and Bangor, Maine. Similar to Starbucks, Dunkin' Donuts cold brew is made in small batches each day.

Of all the items in testing by Dunkin' Donuts, cold brew was the likeliest to go national given the success Starbucks has had with selling the more-refined (and often more expensive) coffee since its launch in 2015 and the consumer appetite for the product.

After Starbucks introduced cold brew last year, sales of iced coffees grew 20% in the fiscal year ended Sept. 27. According to in data from research firm Mintel, U.S. iced coffee consumption has grown by 75% in the past decade, and cold brew sales surged 338.9% between 2010 and 2015.

Starbucks is in the process of rolling out its cold brew to supermarkets. And, it's kicking things up a notch so to speak on the cold brew front. Starbucks will introduce a nitrogen-infused version of its cold brew coffee in about 500 stores this summer. Early markets for the nitro cold brew will include those stores in Portland, Ore., Seattle, New York, Chicago, Boston, Los Angeles and San Francisco.